Jim, Bruno, and Paolo,
I want to eventually get to the point where open(O_CLOEXEC) can be
supported in gnulib for use in libraries like LGPLv2+ libvirt. Along
the way, I will want to make open (LGPLv2+) depend on cloexec (currently
LGPLv3+), which in turn is a thin wrapper around fcntl (currently
LGPLv3+). Meanwhile, I can immediately start using cloexec within
libvirt before O_CLOEXEC support is complete in gnulib.
Are there any objections to relaxing the license?

Not from me, I don't particularly like LGPLv3+ licensing (unlike GPLv3+).
Paolo